Watering lawns must completely provide irrigation of lawns’ area. Compared with no wind, a tail wind and head wind and side wind alter the trajectory of the jet of water that comes out of the water outlets of irrigation pipeline. The influence of the side air flow at right angles to the trajectory of the jet of water on the deviation of trajectory straight direction was investigated. Upgraded the experimental setup with short jets and low-pressure pump was used. The air flow created by the axial ventilator.